



GROW                                                          S. Dikshit
Internet-Draft                                       Aruba Networks, HPE
Intended status: Standards Track                           M. Srivastava
Expires: 20 March 2026                                  Juniper Networks
                                                       16 September 2025


              EVPN-Specific BMP RIB Statistics Extensions
                  draft-saum-grow-bmp-afi-safi-evpn-03

Abstract

   This document defines new EVPN-specific BGP Monitoring Protocol (BMP)
   statistics types.  These extensions include scalar counters for EVPN
   route types (1-8) specifically, while also keeping scope for defining
   counters which are EVPN route-type agnostic but related to BGP-EVPN
   RIB like, number of multihoming Ethernet Segments, number of
   multihomed EVIs, number of aliased paths, number of dynamic inter-VRF
   route leaking (IVRL).

Status of This Memo

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   This Internet-Draft will expire on 20 March 2026.

Copyright Notice

   Copyright (c) 2025 IETF Trust and the persons identified as the
   document authors.  All rights reserved.










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   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents (https://trustee.ietf.org/
   license-info) in effect on the date of publication of this document.
   Please review these documents carefully, as they describe your rights
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   provided without warranty as described in the Revised BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   2
   2.  EVPN-Specific BMP Statistics Extensions . . . . . . . . . . .   3
   3.  YANG Model Alignment  . . . . . . . . . . . . . . . . . . . .   4
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   4
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .   4
   6.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   4
     6.1.  Normative References  . . . . . . . . . . . . . . . . . .   4
     6.2.  Informative References  . . . . . . . . . . . . . . . . .   5
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   5

1.  Introduction

   [RFC7854] defines different BMP statistics message types and
   [I-D.ietf-grow-bmp-bgp-rib-stats] extends the BMP statistics to
   provide more insights into the BGP RIBs.  This document extends the
   BMP RIB statistics by adding EVPN-specific statistics types to
   monitor EVPN-related events in Adj-RIB-In, Adj-RIB-Out, and Local-RIB
   for the EVPN address family (AFI=25, SAFI=70) as defined in [RFC7432]
   and extended by [RFC9135] for integrated routing and bridging, forms
   the basis for these statistics.

   The format of the BMP statistics message remains same as defined in
   [RFC7854].

1.1.  Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL" in this document are to be interpreted as described in BCP
   14 [RFC2119] [RFC8174] when, and only when, they appear in all
   capitals, as shown here.








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2.  EVPN-Specific BMP Statistics Extensions

   This section defines EVPN-specific statistics types for BMP,
   applicable to the EVPN address family (AFI=25, SAFI=70).  These
   statistics type for all 5 RIB views: Adj-RIB-In-Pre, Adj-RIB-In-Post,
   Local-RIB, Adj-RIB-Out-Pre and Adj-RIB-Out-Pre.  The statistics
   values are encoded as 1-byte Stats types, 1 bytes stats sub-type
   followed by 64-bit gauges.  Currently there are EVPN route types
   numbered 1 to 8.  The remaining bits provides flexibility for future
   extensions to EVPN . and to define more specific counters other than
   the route-types in future.

 0                   1                   2                   3
 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Stats Type   |  Stats Subtype   |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|                                   Gauge (64 bits)                         |
~                                                               ~
|                                                               |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

   *  Stats Type (1 bytes): EVPN stats type.  Defined types are:

      -  Type = 0: EVNP route statistics.

   *  Stats subtype (1 bytes): The stats sub type.  Defined subtypes
      are:

      -  Subtype = 0: EVPN route type 1 (Ethernet Auto-discovery).

      -  Subtype = 1: EVPN route type 2 (MAC/IP Advertisement).

      -  Subtype = 2: EVPN route type 3 (Inclusive Multicast Ethernet
         Tag Route).

      -  Subtype = 3: EVPN route type 4 (Ethernet Segment Route).

      -  Subtype = 4: EVPN route type 5 (IP Prefix Route).

      -  Subtype = 5: EVPN route type 6 (EVPN Inclusive Multicast
         Service Interface Route).

      -  Subtype = 6: EVPN route type 7 (EVPN Ethernet Tag Service
         Interface Route).

      -  Subtype = 7: EVPN route type 8 (EVPN IP Prefix Service
         Interface Route).



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      -  Subtype = 8: EVPN route type 9 (EVPN IP Prefix Route with MAC
         Mobility).

3.  YANG Model Alignment

   The counters defined in this document align with the EVPN YANG model
   described in [I-D.ietf-bess-evpn-yang-07].  Route type counters map
   to YANG leaves for EVPN route statistics, multihoming and IVRL
   counters align with Ethernet Segment and VRF-related leaves, the
   route-map bitmap aligns with policy-related leaves, and segment
   failure impact aligns with failure event counters.  The referenced
   EVPN YANG model is expired but used due to its relevance to EVPN
   statistics alignment.  Implementations SHOULD check for newer
   versions.  Implementations SHOULD ensure compatibility with the YANG
   model for integrated monitoring.

4.  IANA Considerations

   This document requests that IANA assign new BMP statistics types from
   the "BMP Statistics Type" registry for the following:

   *  Type TBD_01: rib-in-pre-evpn-route-stats: Statistics for EVPN
      routes received before inbound policy is applied.

   *  Type TBD_02: rib-in-post-evpn-route-stats: Statistics for EVPN
      routes after inbound policy is applied.

   *  Type TBD_03: loc-rib-evpn-route-stats: Statistics for EVPN routes
      in the local RIB.

   *  Type TBD_04: rib-out-pre-evpn-route-stats: Statistics for EVPN
      routes before outbound policy is applied.

   *  Type TBD_05: rib-out-post-evpn-route-stats: Statistics for EVPN
      routes after outbound policy is applied.

   The 5 types are sufficient to provide generic monitoring of EVPN
   route types (1-8) across Adj-RIB-In, Adj-RIB-Out, and Local-RIB.

5.  Security Considerations

   The security considerations of [RFC7854] apply to this document.  No
   additional security risks are introduced by these EVPN-specific
   statistics, including the route-map attributes bitmap.

6.  References

6.1.  Normative References



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   [RFC7854]  Scudder, J., Fernando, R., and S. Stuart, "BGP Monitoring
              Protocol (BMP)", RFC 7854, DOI 10.17487/RFC7854, June
              2016, <https://www.rfc-editor.org/info/rfc7854>.

   [RFC7432]  Sajassi, A., Aggarwal, R., Bitar, N., Isaac, A., Uttaro,
              J., Drake, J., and W. Henderickx, "BGP MPLS-Based Ethernet
              VPN", RFC 7432, DOI 10.17487/RFC7432, February 2015,
              <https://www.rfc-editor.org/info/rfc7432>.

   [RFC9135]  Sajassi, A., Drake, J., Boutros, S., and J. Rabadan,
              "Integrated Routing and Bridging in Ethernet VPN (EVPN)",
              RFC 9135, DOI 10.17487/RFC9135, October 2021,
              <https://www.rfc-editor.org/info/rfc9135>.

   [I-D.ietf-grow-bmp-bgp-rib-stats]
              Srivastava, M., Liu, Y., Lin, C., and J. Li, "Definition
              For New BGP Monitoring Protocol (BMP) Statistics Types",
              Work in Progress draft-ietf-grow-bmp-bgp-rib-stats-08,
              April 2025, <https://datatracker.ietf.org/doc/html/draft-
              ietf-grow-bmp-bgp-rib-stats-08>.

   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels", BCP 14, RFC 2119,
              DOI 10.17487/RFC2119, March 1997,
              <https://www.rfc-editor.org/info/rfc2119>.

   [RFC8174]  Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC
              2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174,
              May 2017, <https://www.rfc-editor.org/info/rfc8174>.

6.2.  Informative References

   [I-D.ietf-bess-evpn-yang-07]
              Brissette, P., Shah, H., Chen, I., and K. Patel, "Yang
              Data Model for EVPN", Work in Progress draft-ietf-bess-
              evpn-yang-07, March 2019,
              <https://datatracker.ietf.org/doc/html/draft-ietf-bess-
              evpn-yang-07>.

Authors' Addresses

   Saumya Dikshit
   Aruba Networks, HPE
   Mahadevpura
   Bangalore 560 048
   Karnataka
   India
   Email: saumya.dikshit@hpe.com



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   Mukul Srivastava
   Juniper Networks
   10 Technology Park Dr
   Westford, MA 01886
   United States of America
   Email: msri@juniper.net













































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